Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. John Allen Walker Jr., MD

Individual provider Diagnostic Radiology Physician · NPI 1477780344

Dr. John Allen Walker Jr., MD is a Diagnostic Radiology in San Antonio, Texas. Graduated from University of Texas Medical School at San Antonio in 2007, 19 years ago. Practices with University of Texas Health Science Center at San Antonio, a 1,295-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
19
Trained at
University of Texas Medical School at San Antonio
Licensed in
TX
In the registry since
2009
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4502 Medical Dr
San Antonio, TX 78229-4402
Phone: (210) 358-4000
Fax: (210) 567-6418
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Vascular & Interventional Radiology Physician (primary) Taxonomy 2085R0204X · Licence P1944 (TX)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence P1944 (TX)

Record details

NPI number1477780344
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 17, 2009
Last updated in NPPESDecember 11, 2024
Certification dateDecember 11, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO
Graduated 2007 (19 years in practice)
Group practice University Of Texas Health Science Center At San Antonio — 1295 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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